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Hadoop >> mail # user >> Map works well, but Redue failed


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Re: Map works well, but Redue failed
Hi raj,

I think you should increase the reducer worker threads,to fetch the map output.

Regards
Abhishek.

Sent from my iPhone

On Jun 15, 2012, at 9:42 PM, Raj Vishwanathan <[EMAIL PROTECTED]> wrote:

> Most probably you have a network problem. Check your hostname and IP address mapping
>
>
>
>> ________________________________
>> From: Yongwei Xing <[EMAIL PROTECTED]>
>> To: [EMAIL PROTECTED]
>> Sent: Thursday, June 14, 2012 10:15 AM
>> Subject: Map works well, but Redue failed
>>
>> Hi all
>>
>> I run a simple sort program, however, I meet such error like below.
>>
>> 12/06/15 01:13:17 WARN mapred.JobClient: Error reading task outputServer
>> returned HTTP response code: 403 for URL:
>> http://192.168.1.106:50060/tasklog?plaintext=true&attemptid=attempt_201206150102_0002_m_000001_1&filter=stdout
>> 12/06/15 01:13:18 WARN mapred.JobClient: Error reading task outputServer
>> returned HTTP response code: 403 for URL:
>> http://192.168.1.106:50060/tasklog?plaintext=true&attemptid=attempt_201206150102_0002_m_000001_1&filter=stderr
>> 12/06/15 01:13:20 INFO mapred.JobClient:  map 50% reduce 0%
>> 12/06/15 01:13:23 INFO mapred.JobClient:  map 100% reduce 0%
>> 12/06/15 01:14:19 INFO mapred.JobClient: Task Id :
>> attempt_201206150102_0002_m_000000_2, Status : FAILED
>> Too many fetch-failures
>> 12/06/15 01:14:20 WARN mapred.JobClient: Error reading task outputServer
>> returned HTTP response code: 403 for URL:
>> http://192.168.1.106:50060/tasklog?plaintext=true&attemptid=attempt_201206150102_0002_m_000000_2&filter=stdout
>>
>> Does anyone know what's the reason and how to resolve it?
>>
>> Best Regards,
>>
>> --
>> Welcome to my ET Blog http://www.jdxyw.com
>>
>>